Development of non-air entrainment and internal hydrophobic porous powder for high performance of concrete

开发用于高性能混凝土的非引气和内部疏水性多孔粉末

• 批准号: 24656318
• 负责人: HAMA YUKIO
• 金额: $ 2.58万
• 依托单位: Muroran Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656318/
• 关键词: コンクリート; モルタル; 高性能化; 多孔質粉体; 空気連行; 耐凍害性; 強度低下; 建築構造・材料

In this study, the aim is to develop a non-air entrainment and internal hydrophobic porous powder in order to establish a new technique which can contribute to improve the frost resistance and reduce the strength reduction due to entrained air bubbles caused in AE concrete.As a result, when ALC was used for the material of the porous powder, it was possible to control the water repellency and the adsorption properties of water vapor by changing the addition rate and type of silicone oil, ultraviolet treatment and adsorption of hydrophilic agent to the powder surface. But it was difficult to make a porous powder having hybrid properties of the hydrophilic surface and internal hydrophobic capillary.On the other hand, when the hardened cement paste with low W/C was used for the material of the porous powder, even without water repellency, there was no air-entraining and it was possible to reduce the strength reduction and improve the frost resistance of mortar.

本研究旨在开发一种无夹气、内部疏水的多孔粉末，以建立一种新的技术，以提高AE混凝土的抗冻性，减少因夹带气泡而导致的强度降低。结果表明，当ALC用于多孔粉末材料时，可以通过改变硅油的加入量和类型、紫外线处理以及亲水剂对粉末表面的吸附来控制粉末的憎水性和水蒸气的吸附性能。但很难制备出表面亲水、内部疏水的混合性能的多孔粉；另一方面，采用低水比硬化水泥浆体作为多孔粉的材料，即使没有疏水性，也不会引气，有可能减少砂浆的强度下降，提高砂浆的抗冻性。

项目成果

Effect of water-repellent porous powder as air entraining agent on the forst resistance of mortar incorporating fly ash and shrinkage reducing admixture

憎水多孔粉体作为引气剂对粉煤灰减缩剂砂浆耐久性的影响

• 作者: Daichi Wakamatsu;Reiko Narumi;Mohamed Zakaria;Yoshihiko Kishimoto;Yukio Hama
• 通讯作者: Yukio Hama

Effect of water-repellent powder as air entraining agent on the frost resistance of mortar incorporating fly ash and shrinkage reducing admixture

憎水粉作引气剂对粉煤灰减缩剂砂浆抗冻性能的影响

• 发表时间: 2013
• 作者: Daichi Wakamatsu;Reiko Narumi;Yoshihiko Kishimoto;Yukio Hama
• 通讯作者: Yukio Hama

Applicability of water-repellent porous powder as air-entraining material in mortar containing fly ash or shrinkage reducing admixture

憎水多孔粉末作为引气材料在含粉煤灰或减缩剂的砂浆中的适用性

• 发表时间: 2014
• 作者: Daichi Wakamatsu;Yukio Hama;Mohamed Zakaria;Reiko Narumi;Tohru Nakamura
• 通讯作者: Tohru Nakamura

空気連行を目的とした撥水性多孔質粉体のフライアッシュ・収縮低減剤混入モルタルへの適用性

憎水多孔粉引气剂在粉煤灰/减缩剂混合砂浆中的适用性

• 发表时间: 2013
• 作者: Daichi Wakamatsu;Yukio Hama;Mohamed Zakaria;Reiko Narumi;Tohru Nakamura;若松大地,鳴海玲子,濱幸雄
• 通讯作者: 若松大地,鳴海玲子,濱幸雄